Trygve Helgaker is a professor of chemistry at the University of Oslo, where he is part of the Department of Chemistry. He also holds the position of director of the Hylleraas Centre for Quantum Molecular Sciences. His career history includes an affiliation with the Centre For Theoretical And Computational Chemistry at the University of Oslo. Born on August 11, 1953, in Porsgrunn, Norway, Helgaker has dedicated his career to the field of chemistry.